It is saying this:
Error mounting /dev/sdc2 at /media/sudheer/Untitled:
Command-line `mount -t "exfat" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,
iocharset=utf8,namecase=0,errors=remount-ro,umask=0077" "/dev/sdc2"
"/media/sudheer/Untitled"'
exited with non-zero exit status 32: mount: unknown filesystem type 'exfat'
You get this error because the exfat filesystem is not installed in Ubuntu by default. exFAT is a proprietary and patented by Microsoft.
Since Ubuntu 13.10, this package is in the main repository. Just install exfat-fuse and exfat-utils:
sudo apt-get install exfat-fuse exfat-utils
Source: Pablo Bianchi - Mount unknown filesystem exfat
-getsuffix, i.e.sudo apt install exfat-fuse exfat-utilsis all that is needed. – pzrq Mar 02 '18 at 20:01